Microwave-mediated solventless synthesis of new derivatives of marine alkaloid Leucettamine B
摘要:
New access to N-alkyl derivatives of the marine alkaloid Leucettamine B are described using two three-step convergent routes. For the formation of the 2-amino imidazolone ring, the key steps involve solvent-free condensations under microwaves and guanylation reactions with non-sterically hindered primary amines. (C) 2002 Elsevier Science Ltd. All rights reserved.
IMIDAZAOLONE DERIVATIVES,PREPARATION THEREOF AND BIOLOGICAL USE OF SAME
申请人:Carreaux Francois
公开号:US20100216855A1
公开(公告)日:2010-08-26
Imidazolone derivatives, as medicaments, of formula
wherein:
R
1
═H, C
1
to C
5
alkyl, aryl or a 5- or 6-membered heterocyclic group;
Ar
1
=optionally substituted aryl or an aromatic heterocycle;
R═R
2
—S—, R
3
—HN—, R
4
COHN or Ar
2
, with
R
2
=a C
1
-C
5
alkyl, vinyl or vinyl(C
1
-C
5
)alkyl, nitrile or nitrile(C
1
-C
5
)alkyl, aryl or benzyl radical, which are optionally substituted;
R
3
=the meanings given above and H;
Ar
2
=substituted or unsubstituted aryl.
Novel Oxidative Transformation of Indenoisoquinolines to Isoquinoline-3-spiro-3‘-phthalides in the Presence of Osmium Tetraoxide and 4-Methylmorpholine <i>N</i>-Oxide
作者:Muthusamy Jayaraman、Phillip E. Fanwick、Mark Cushman
DOI:10.1021/jo980928y
日期:1998.8.1
DERIVES D'IMIDAZOLONES, PROCEDE DE PREPARATION ET APPLICATIONS BIOLOGIQUES